The CD manual appears to recommend replacing both the copper seal ring (7f) and o-ring (7h), as well as the compression spring (7i). Has anyone else replaced this spring too?

Sixto, do you remember which item could be replaced in different positions? It looks like you're referring to item 7g in the diagram.

I'll purchase tool number 617 589 01 09 00 when I order the other parts. I need those inj. line clips too.

MB job number 07. 1-8627: